﻿using System;
using System.Collections.Generic;
using System.IO;
using System.Net;
using System.Text;
using System.Web.Script.Serialization;
using System.Net.Security;
using System.Security.Cryptography.X509Certificates;

namespace WeChat.Common
{
    public class GetReturnJson
    {
        //向一个url地址发送get请求，得到返回值json
        public string getReturnJson(string url)
        {
            Stream stream = WebRequest.Create(url).GetResponse().GetResponseStream();
            StreamReader msg = new StreamReader(stream,Encoding.UTF8);
            string RtnMsg = msg.ReadToEnd();
            msg.Close();
            stream.Close();
            //ApplicationLog.Write("get请求返回的json数据:" + RtnMsg);
            return RtnMsg;
            //var js = new JavaScriptSerializer();
            //var dic = js.Deserialize<Dictionary<string, object>>(RtnMsg);
            //return dic;
        }

        //向一个url地址发送post请求数据(jsondata)，并得到返回值json
        public string postReturnJson(string url, string jsondata)
        {
            //string jsondata = Newtonsoft.Json.JsonConvert.SerializeObject(dictionary);
            HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
            request.ProtocolVersion = HttpVersion.Version10;
            request.Method = "POST";
            request.ContentType = "application/json";
            request.UserAgent = "Mozilla/5.0 (compatible; MSIE 8.0; Windows NT 5.2; SV1; .NET CLR 3.5.21022; .NET CLR 4.0.30319)";

            byte[] data = Encoding.UTF8.GetBytes(jsondata);
            request.ContentLength = data.Length;
            Stream stream = request.GetRequestStream();
            stream.Write(data, 0, data.Length);
            stream.Close();
            HttpWebResponse response = request.GetResponse() as HttpWebResponse;
            StreamReader reader = new StreamReader(response.GetResponseStream());
            string result = reader.ReadToEnd();
            reader.Close();
            //ApplicationLog.Write("post请求返回的json数据:" + result);
            return result;
            //var js = new JavaScriptSerializer();
            //var dic = js.Deserialize<Dictionary<string, object>>(result);
            //return dic;
            
        }

        /// <summary>  
        /// 创建POST方式的HTTP请求  方式二
        /// </summary>  
        /// <param name="url">请求的URL</param>  
        /// <param name="parameters">随同请求POST的参数名称及参数值字典</param>  IDictionary<string, string> parameters
        /// <param name="timeout">请求的超时时间</param>  
        /// <param name="userAgent">请求的客户端浏览器信息，可以为空</param>  
        /// <param name="requestEncoding">发送HTTP请求时所用的编码</param>  
        /// <param name="cookies">随同HTTP请求发送的Cookie信息，如果不需要身份验证可以为空</param>  
        /// <returns></returns>  
        private static readonly string DefaultUserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727)";  

        public static Dictionary<string, object> CreatePostHttpResponse(string url,string jsondata , int? timeout, string userAgent, Encoding requestEncoding, CookieCollection cookies)
        {
            if (string.IsNullOrEmpty(url))
            {
                throw new ArgumentNullException("url");
            }
            //if (requestEncoding == null)
            //{
            //    throw new ArgumentNullException("requestEncoding");
            //}
            HttpWebRequest request = null;
            //如果是发送HTTPS请求  
            if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase))
            {
                ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult);
                request = WebRequest.Create(url) as HttpWebRequest;
                request.ProtocolVersion = HttpVersion.Version10;
            }
            else
            {
                request = WebRequest.Create(url) as HttpWebRequest;
            }
            request.Method = "POST";
            request.ContentType = "application/x-www-form-urlencoded";

            if (!string.IsNullOrEmpty(userAgent))
            {
                request.UserAgent = userAgent;
            }
            else
            {
                request.UserAgent = DefaultUserAgent;
            }

            if (timeout.HasValue)
            {
                request.Timeout = timeout.Value;
            }
            if (cookies != null)
            {
                request.CookieContainer = new CookieContainer();
                request.CookieContainer.Add(cookies);
            }
            //如果需要POST数据  
            //if (!(parameters == null || parameters.Count == 0))
            //{
            //    StringBuilder buffer = new StringBuilder();
            //    int i = 0;
            //    foreach (string key in parameters.Keys)
            //    {
            //        if (i > 0)
            //        {
            //            buffer.AppendFormat("&{0}={1}", key, parameters[key]);
            //        }
            //        else
            //        {
            //            buffer.AppendFormat("{0}={1}", key, parameters[key]);
            //        }
            //        i++;
            //    }
            //   byte[] data = requestEncoding.GetBytes(buffer.ToString());
            byte[] data = Encoding.UTF8.GetBytes(jsondata);
                using (Stream stream = request.GetRequestStream())
                {
                    stream.Write(data, 0, data.Length);
                }
            //}
            HttpWebResponse response = request.GetResponse() as HttpWebResponse;
            StreamReader reader = new StreamReader(response.GetResponseStream());
            string result = reader.ReadToEnd();
            reader.Close();
            ApplicationLog.Write("post请求返回的json数据:" + result);

            var js = new JavaScriptSerializer();
            var dic = js.Deserialize<Dictionary<string, object>>(result);
            return dic;
        }
        private static bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors)
        {
            return true; //总是接受  
        } 

        
    }
}
